Yesterday for the first time I could compare my jtv 69 with a Variax 300, in a same pod hd500 and same parameters, and my impressions were: the electric sounds of jtv are really superior, more realistic, but the acoustic sounds of the Variax 300 sounded much better in my humble opinion, I thought the guitars of 300 acoustic softer, less aggressive, more softly, more balanced. I thought the 300 best in the 5 positions of acoustic sounds

There have been some complaints about the new JTV HD acoustics since they add some room ambience to the actual emulation. Since this cannot be removed some users preferred the previous sounds. Also don't forget to play with your tone knob as this will control the compression and (I think) the microphone position relative to the sound hole. (Simulated)